/*
* FILE NAME
* arch/mips/vr41xx/common/int-handler.S
*
* BRIEF MODULE DESCRIPTION
* Interrupt dispatcher for the NEC VR4100 series.
*
* Author: Yoichi Yuasa
* yyuasa@mvista.com or source@mvista.com
*
* Copyright 2001 MontaVista Software Inc.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
* TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
* USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 675 Mass Ave, Cambridge, MA 02139, USA.
*/
/*
* Changes:
* MontaVista Software Inc. <yyuasa@mvista.com> or <source@mvista.com>
* - New creation, NEC VR4100 series are supported.
*
* Yoichi Yuasa <yuasa@hh.iij4u.or.jp>
* - Coped with INTASSIGN of NEC VR4133.
*/
#include <asm/asm.h>
#include <asm/regdef.h>
#include <asm/mipsregs.h>
#include <asm/stackframe.h>
.text
.set noreorder
.align 5
NESTED(vr41xx_handle_interrupt, PT_SIZE, ra)
.set noat
SAVE_ALL
CLI
.set at
.set noreorder
/*
* Get the pending interrupts
*/
mfc0 t0, CP0_CAUSE
mfc0 t1, CP0_STATUS
andi t0, 0xff00
and t0, t0, t1
andi t1, t0, CAUSEF_IP7 # MIPS timer interrupt
bnez t1, handle_irq
li a0, 7
andi t1, t0, 0x7800 # check for Int1-4
beqz t1, 1f
andi t1, t0, CAUSEF_IP3 # check for Int1
bnez t1, handle_int
li a0, 1
andi t1, t0, CAUSEF_IP4 # check for Int2
bnez t1, handle_int
li a0, 2
andi t1, t0, CAUSEF_IP5 # check for Int3
bnez t1, handle_int
li a0, 3
andi t1, t0, CAUSEF_IP6 # check for Int4
bnez t1, handle_int
li a0, 4
1:
andi t1, t0, CAUSEF_IP2 # check for Int0
bnez t1, handle_int
li a0, 0
andi t1, t0, CAUSEF_IP0 # check for IP0
bnez t1, handle_irq
li a0, 0
andi t1, t0, CAUSEF_IP1 # check for IP1
bnez t1, handle_irq
li a0, 1
j spurious_interrupt
nop
handle_int:
jal irq_dispatch
move a1, sp
j ret_from_irq
nop
handle_irq:
jal do_IRQ
move a1, sp
j ret_from_irq
END(vr41xx_handle_interrupt)
